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<p id="1%E3%80%81%E4%BA%8C%E7%BB%B4%E7%A0%81%E7%AE%80%E4%BB%8B-toc" style="margin-left:0px;"><a href="#1%E3%80%81%E4%BA%8C%E7%BB%B4%E7%A0%81%E7%AE%80%E4%BB%8B">1、二维码简介</a></p> 
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<h1 id="1%E3%80%81%E4%BA%8C%E7%BB%B4%E7%A0%81%E7%AE%80%E4%BB%8B">1、二维码简介</h1> 
<p style="text-indent:33px;">目前流行的二维码（QR code）是1994年由日本Denso-Wave公司发明的。英文字中 QR 所代表的意义是Quick Response，即快速反应。QR code最早用于汽车制造商追踪零件&amp;#</p>
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	<em>python</em>编程入门，针对0基础就<em>python</em>语言基础语法的各个点逐步讲解，由浅入深，通俗易懂，层层深入。 


	  


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				<div class="desc ellipsis-online ellipsis-online-1">一行<em>代码</em>实现<em>动态</em><em>制作</em><em>二维码</em>
<em>python</em>的强大是你远远想不到的
通过引入MyQR模块，迅速实现<em>二维码</em>生成
除了words没有默认值外，需要你自己填写，其他的属性都有默认值，可以默认不填写

```<em>python</em>
from MyQR import myqr

myqr.run(
    words=&#39;http://www.mengnn.cn&#39;, #把words的内容生成<em>二维码</em>
    version = 5, # 设置容错率
    level = &#39;H&#39;, # 控制纠错水平，范围是L、M、Q、H，从左到右依次</div>
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&nbsp;

&nbsp;



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	【课程如何观看？】 


	PC端：https://edu.csdn.net/course/detail/27177 


	移动端：CSDN 学院APP（注意不是CSDN APP哦）


	本课程为录播课，课程永久观看时长，大家可以抓紧时间学习后一起讨论哦~


	


	
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				<div class="desc ellipsis-online ellipsis-online-1"><em>python</em>求和函数sum()详解
今天在学习的过程中，误用sum()函数，我又去查了查<em>python</em> sum()函数才恍然大悟。
我本来想算几个Int值相加的和，本以为很简单的事情，结果却很悲伤，例：
&gt;&gt;&gt;sum = sum(1,2,3)         #结果很明显出现问题报错
TypeError: sum expected at most 2 arguments, got ...</div>
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				<div class="desc ellipsis-online ellipsis-online-1"><em>Python</em>中如何求列表list的平均数
当列表list中只包含数字时，如何求取它的平均数：
from numpy import *
a = [52,69,35,65,89,15,34]
b = mean(a)
print(b)

运行结果:
51.285714285714285


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                <a class="title text-truncate" target="_blank" href="https://handsome-man.blog.csdn.net/article/details/113463524#comments_15215905" data-report-click='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/113463524#comments_15215905","ab":"new"}' data-report-view='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/113463524#comments_15215905","ab":"new"}'>双非本科生、非大厂，毕业一年，业余净收入20万</a>
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                    <a href="https://blog.csdn.net/ma2595162349" class="user-name" target="_blank">晨梦思雨: </a>
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                <a class="title text-truncate" target="_blank" href="https://handsome-man.blog.csdn.net/article/details/112007303#comments_15206921" data-report-click='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/112007303#comments_15206921","ab":"new"}' data-report-view='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/112007303#comments_15206921","ab":"new"}'>&ldquo;五年饮冰，难凉热血&rdquo;，一名专科生的求学历程</a>
                <p class="comment ellipsis">
                    <a href="https://blog.csdn.net/weixin_44788542" class="user-name" target="_blank">a只如初见: </a>
                    <span class="code-comments">同嵌入式行业。</span>
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                <a class="title text-truncate" target="_blank" href="https://handsome-man.blog.csdn.net/article/details/108749135#comments_15206598" data-report-click='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/108749135#comments_15206598","ab":"new"}' data-report-view='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/108749135#comments_15206598","ab":"new"}'>让人&ldquo;眼前一亮、不明觉厉&rdquo;的互联网技术PPT</a>
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                    <a href="https://blog.csdn.net/qhfei" class="user-name" target="_blank">qhfei: </a>
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                <a class="title text-truncate" target="_blank" href="https://handsome-man.blog.csdn.net/article/details/103747064#comments_15203416" data-report-click='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/103747064#comments_15203416","ab":"new"}' data-report-view='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/103747064#comments_15203416","ab":"new"}'>STM32F103C8/BT6最小系统原理图、PCB</a>
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                    <a href="https://blog.csdn.net/qq_41899186" class="user-name" target="_blank">qq_41899186: </a>
                    <span class="code-comments">STM32F103C8T6最小系统</span>
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                <a class="title text-truncate" target="_blank" href="https://handsome-man.blog.csdn.net/article/details/113463524#comments_15201356" data-report-click='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/113463524#comments_15201356","ab":"new"}' data-report-view='{"mod":"popu_542","spm":"1001.2101.3001.4231","dest":"https://handsome-man.blog.csdn.net/article/details/113463524#comments_15201356","ab":"new"}'>双非本科生、非大厂，毕业一年，业余净收入20万</a>
                <p class="comment ellipsis">
                    <a href="https://blog.csdn.net/jasonz227" class="user-name" target="_blank">最早的早安227: </a>
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